cc/layers/heads_up_display_layer_impl.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/layers/heads_up_display_layer_impl.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "base/strings/stringprintf.h"
  11 #include "base/trace_event/trace_event.h"
  12 #include "base/trace_event/trace_event_argument.h"
  13 #include "cc/debug/debug_colors.h"
  14 #include "cc/debug/frame_rate_counter.h"
  15 #include "cc/debug/paint_time_counter.h"
  16 #include "cc/output/begin_frame_args.h"
  17 #include "cc/output/renderer.h"
  18 #include "cc/quads/texture_draw_quad.h"
  19 #include "cc/resources/memory_history.h"
  20 #include "cc/trees/layer_tree_host_impl.h"
  21 #include "cc/trees/layer_tree_impl.h"
  22 #include "skia/ext/platform_canvas.h"
  23 #include "third_party/khronos/GLES2/gl2.h"
  24 #include "third_party/khronos/GLES2/gl2ext.h"
  25 #include "third_party/skia/include/core/SkBitmap.h"
  26 #include "third_party/skia/include/core/SkPaint.h"
  27 #include "third_party/skia/include/core/SkTypeface.h"
  28 #include "third_party/skia/include/effects/SkColorMatrixFilter.h"
  29 #include "ui/gfx/geometry/point.h"
  30 #include "ui/gfx/geometry/size.h"
  31 #include "ui/gfx/geometry/size_conversions.h"
  32 #include "ui/gfx/hud_font.h"
  33
  34 namespace cc {
  35
  36 static inline SkPaint CreatePaint() {
  37   SkPaint paint;
  38 #if (SK_R32_SHIFT || SK_B32_SHIFT != 16)
  39   // The SkCanvas is in RGBA but the shader is expecting BGRA, so we need to
  40   // swizzle our colors when drawing to the SkCanvas.
  41   SkColorMatrix swizzle_matrix;
  42   for (int i = 0; i < 20; ++i)
  43     swizzle_matrix.fMat[i] = 0;
  44   swizzle_matrix.fMat[0 + 5 * 2] = 1;
  45   swizzle_matrix.fMat[1 + 5 * 1] = 1;
  46   swizzle_matrix.fMat[2 + 5 * 0] = 1;
  47   swizzle_matrix.fMat[3 + 5 * 3] = 1;
  48
  49   skia::RefPtr<SkColorMatrixFilter> filter =
  50       skia::AdoptRef(SkColorMatrixFilter::Create(swizzle_matrix));
  51   paint.setColorFilter(filter.get());
  52 #endif
  53   return paint;
  54 }
  55
  56 HeadsUpDisplayLayerImpl::Graph::Graph(double indicator_value,
  57                                       double start_upper_bound)
  58     : value(0.0),
  59       min(0.0),
  60       max(0.0),
  61       current_upper_bound(start_upper_bound),
  62       default_upper_bound(start_upper_bound),
  63       indicator(indicator_value) {}
  64
  65 double HeadsUpDisplayLayerImpl::Graph::UpdateUpperBound() {
  66   double target_upper_bound = std::max(max, default_upper_bound);
  67   current_upper_bound += (target_upper_bound - current_upper_bound) * 0.5;
  68   return current_upper_bound;
  69 }
  70
  71 HeadsUpDisplayLayerImpl::HeadsUpDisplayLayerImpl(LayerTreeImpl* tree_impl,
  72                                                  int id)
  73     : LayerImpl(tree_impl, id),
  74       typeface_(gfx::GetHudTypeface()),
  75       internal_contents_scale_(1.f),
  76       fps_graph_(60.0, 80.0),
  77       paint_time_graph_(16.0, 48.0),
  78       fade_step_(0) {
  79   if (!typeface_) {
  80     typeface_ = skia::AdoptRef(
  81         SkTypeface::CreateFromName("monospace", SkTypeface::kBold));
  82   }
  83 }
  84
  85 HeadsUpDisplayLayerImpl::~HeadsUpDisplayLayerImpl() {}
  86
  87 scoped_ptr<LayerImpl> HeadsUpDisplayLayerImpl::CreateLayerImpl(
  88     LayerTreeImpl* tree_impl) {
  89   return HeadsUpDisplayLayerImpl::Create(tree_impl, id());
  90 }
  91
  92 void HeadsUpDisplayLayerImpl::AcquireResource(
  93     ResourceProvider* resource_provider) {
  94   for (ScopedPtrVector<ScopedResource>::iterator it = resources_.begin();
  95        it != resources_.end();
  96        ++it) {
  97     if (!resource_provider->InUseByConsumer((*it)->id())) {
  98       resources_.swap(it, resources_.end() - 1);
  99       return;
 100     }
 101   }
 102
 103   scoped_ptr<ScopedResource> resource =
 104       ScopedResource::Create(resource_provider);
 105   resource->Allocate(internal_content_bounds_,
 106                      ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);
 107   resources_.push_back(resource.Pass());
 108 }
 109
 110 class ResourceSizeIsEqualTo {
 111  public:
 112   explicit ResourceSizeIsEqualTo(const gfx::Size& size_)
 113       : compare_size_(size_) {}
 114
 115   bool operator()(const ScopedResource* resource) {
 116     return resource->size() == compare_size_;
 117   }
 118
 119  private:
 120   const gfx::Size compare_size_;
 121 };
 122
 123 void HeadsUpDisplayLayerImpl::ReleaseUnmatchedSizeResources(
 124     ResourceProvider* resource_provider) {
 125   ScopedPtrVector<ScopedResource>::iterator it_erase =
 126       resources_.partition(ResourceSizeIsEqualTo(internal_content_bounds_));
 127   resources_.erase(it_erase, resources_.end());
 128 }
 129
 130 bool HeadsUpDisplayLayerImpl::WillDraw(DrawMode draw_mode,
 131                                        ResourceProvider* resource_provider) {
 132   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
 133     return false;
 134
 135   internal_contents_scale_ = draw_properties().ideal_contents_scale;
 136   internal_content_bounds_ =
 137       gfx::ToCeiledSize(gfx::ScaleSize(bounds(), internal_contents_scale_));
 138
 139   ReleaseUnmatchedSizeResources(resource_provider);
 140   AcquireResource(resource_provider);
 141   return LayerImpl::WillDraw(draw_mode, resource_provider);
 142 }
 143
 144 void HeadsUpDisplayLayerImpl::AppendQuads(
 145     RenderPass* render_pass,
 146     AppendQuadsData* append_quads_data) {
 147   if (!resources_.back()->id())
 148     return;
 149
 150   SharedQuadState* shared_quad_state =
 151       render_pass->CreateAndAppendSharedQuadState();
 152   PopulateScaledSharedQuadState(shared_quad_state, internal_contents_scale_);
 153
 154   gfx::Rect quad_rect(internal_content_bounds_);
 155   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
 156   gfx::Rect visible_quad_rect(quad_rect);
 157   bool premultiplied_alpha = true;
 158   gfx::PointF uv_top_left(0.f, 0.f);
 159   gfx::PointF uv_bottom_right(1.f, 1.f);
 160   const float vertex_opacity[] = { 1.f, 1.f, 1.f, 1.f };
 161   bool flipped = false;
 162   bool nearest_neighbor = false;
 163   TextureDrawQuad* quad =
 164       render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 165   quad->SetNew(shared_quad_state,
 166                quad_rect,
 167                opaque_rect,
 168                visible_quad_rect,
 169                resources_.back()->id(),
 170                premultiplied_alpha,
 171                uv_top_left,
 172                uv_bottom_right,
 173                SK_ColorTRANSPARENT,
 174                vertex_opacity,
 175                flipped,
 176                nearest_neighbor);
 177 }
 178
 179 void HeadsUpDisplayLayerImpl::UpdateHudTexture(
 180     DrawMode draw_mode,
 181     ResourceProvider* resource_provider) {
 182   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE || !resources_.back()->id())
 183     return;
 184
 185   SkISize canvas_size;
 186   if (hud_surface_)
 187     canvas_size = hud_surface_->getCanvas()->getDeviceSize();
 188   else
 189     canvas_size.set(0, 0);
 190
 191   if (canvas_size.width() != internal_content_bounds_.width() ||
 192       canvas_size.height() != internal_content_bounds_.height() ||
 193       !hud_surface_) {
 194     TRACE_EVENT0("cc", "ResizeHudCanvas");
 195
 196     hud_surface_ = skia::AdoptRef(SkSurface::NewRasterN32Premul(
 197         internal_content_bounds_.width(), internal_content_bounds_.height()));
 198   }
 199
 200   UpdateHudContents();
 201
 202   {
 203     TRACE_EVENT0("cc", "DrawHudContents");
 204     hud_surface_->getCanvas()->clear(SkColorSetARGB(0, 0, 0, 0));
 205     hud_surface_->getCanvas()->save();
 206     hud_surface_->getCanvas()->scale(internal_contents_scale_,
 207                                      internal_contents_scale_);
 208
 209     DrawHudContents(hud_surface_->getCanvas());
 210
 211     hud_surface_->getCanvas()->restore();
 212   }
 213
 214   TRACE_EVENT0("cc", "UploadHudTexture");
 215   SkImageInfo info;
 216   size_t row_bytes = 0;
 217   const void* pixels = hud_surface_->getCanvas()->peekPixels(&info, &row_bytes);
 218   DCHECK(pixels);
 219   DCHECK(info.colorType() == kN32_SkColorType);
 220   resource_provider->CopyToResource(resources_.back()->id(),
 221                                     static_cast<const uint8_t*>(pixels),
 222                                     internal_content_bounds_);
 223 }
 224
 225 void HeadsUpDisplayLayerImpl::ReleaseResources() {
 226   resources_.clear();
 227 }
 228
 229 void HeadsUpDisplayLayerImpl::UpdateHudContents() {
 230   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 231
 232   // Don't update numbers every frame so text is readable.
 233   base::TimeTicks now = layer_tree_impl()->CurrentBeginFrameArgs().frame_time;
 234   if (base::TimeDelta(now - time_of_last_graph_update_).InSecondsF() > 0.25f) {
 235     time_of_last_graph_update_ = now;
 236
 237     if (debug_state.show_fps_counter) {
 238       FrameRateCounter* fps_counter = layer_tree_impl()->frame_rate_counter();
 239       fps_graph_.value = fps_counter->GetAverageFPS();
 240       fps_counter->GetMinAndMaxFPS(&fps_graph_.min, &fps_graph_.max);
 241     }
 242
 243     if (debug_state.continuous_painting) {
 244       PaintTimeCounter* paint_time_counter =
 245           layer_tree_impl()->paint_time_counter();
 246       base::TimeDelta latest, min, max;
 247
 248       if (paint_time_counter->End())
 249         latest = **paint_time_counter->End();
 250       paint_time_counter->GetMinAndMaxPaintTime(&min, &max);
 251
 252       paint_time_graph_.value = latest.InMillisecondsF();
 253       paint_time_graph_.min = min.InMillisecondsF();
 254       paint_time_graph_.max = max.InMillisecondsF();
 255     }
 256
 257     if (debug_state.ShowMemoryStats()) {
 258       MemoryHistory* memory_history = layer_tree_impl()->memory_history();
 259       if (memory_history->End())
 260         memory_entry_ = **memory_history->End();
 261       else
 262         memory_entry_ = MemoryHistory::Entry();
 263     }
 264   }
 265
 266   fps_graph_.UpdateUpperBound();
 267   paint_time_graph_.UpdateUpperBound();
 268 }
 269
 270 void HeadsUpDisplayLayerImpl::DrawHudContents(SkCanvas* canvas) {
 271   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 272
 273   if (debug_state.ShowHudRects()) {
 274     DrawDebugRects(canvas, layer_tree_impl()->debug_rect_history());
 275     if (IsAnimatingHUDContents()) {
 276       layer_tree_impl()->SetNeedsRedraw();
 277     }
 278   }
 279
 280   SkRect area = SkRect::MakeEmpty();
 281   if (debug_state.continuous_painting) {
 282     area = DrawPaintTimeDisplay(
 283         canvas, layer_tree_impl()->paint_time_counter(), 0, 0);
 284   } else if (debug_state.show_fps_counter) {
 285     // Don't show the FPS display when continuous painting is enabled, because
 286     // it would show misleading numbers.
 287     area =
 288         DrawFPSDisplay(canvas, layer_tree_impl()->frame_rate_counter(), 0, 0);
 289   }
 290
 291   if (debug_state.show_fps_counter || debug_state.continuous_painting) {
 292     area = DrawGpuRasterizationStatus(canvas, 0, area.bottom(),
 293                                       SkMaxScalar(area.width(), 150));
 294   }
 295
 296   if (debug_state.ShowMemoryStats())
 297     DrawMemoryDisplay(canvas, 0, area.bottom(), SkMaxScalar(area.width(), 150));
 298 }
 299
 300 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 301                                        SkPaint* paint,
 302                                        const std::string& text,
 303                                        SkPaint::Align align,
 304                                        int size,
 305                                        int x,
 306                                        int y) const {
 307   const bool anti_alias = paint->isAntiAlias();
 308   paint->setAntiAlias(true);
 309
 310   paint->setTextSize(size);
 311   paint->setTextAlign(align);
 312   paint->setTypeface(typeface_.get());
 313   canvas->drawText(text.c_str(), text.length(), x, y, *paint);
 314
 315   paint->setAntiAlias(anti_alias);
 316 }
 317
 318 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 319                                        SkPaint* paint,
 320                                        const std::string& text,
 321                                        SkPaint::Align align,
 322                                        int size,
 323                                        const SkPoint& pos) const {
 324   DrawText(canvas, paint, text, align, size, pos.x(), pos.y());
 325 }
 326
 327 void HeadsUpDisplayLayerImpl::DrawGraphBackground(SkCanvas* canvas,
 328                                                   SkPaint* paint,
 329                                                   const SkRect& bounds) const {
 330   paint->setColor(DebugColors::HUDBackgroundColor());
 331   canvas->drawRect(bounds, *paint);
 332 }
 333
 334 void HeadsUpDisplayLayerImpl::DrawGraphLines(SkCanvas* canvas,
 335                                              SkPaint* paint,
 336                                              const SkRect& bounds,
 337                                              const Graph& graph) const {
 338   // Draw top and bottom line.
 339   paint->setColor(DebugColors::HUDSeparatorLineColor());
 340   canvas->drawLine(bounds.left(),
 341                    bounds.top() - 1,
 342                    bounds.right(),
 343                    bounds.top() - 1,
 344                    *paint);
 345   canvas->drawLine(
 346       bounds.left(), bounds.bottom(), bounds.right(), bounds.bottom(), *paint);
 347
 348   // Draw indicator line (additive blend mode to increase contrast when drawn on
 349   // top of graph).
 350   paint->setColor(DebugColors::HUDIndicatorLineColor());
 351   paint->setXfermodeMode(SkXfermode::kPlus_Mode);
 352   const double indicator_top =
 353       bounds.height() * (1.0 - graph.indicator / graph.current_upper_bound) -
 354       1.0;
 355   canvas->drawLine(bounds.left(),
 356                    bounds.top() + indicator_top,
 357                    bounds.right(),
 358                    bounds.top() + indicator_top,
 359                    *paint);
 360   paint->setXfermode(nullptr);
 361 }
 362
 363 SkRect HeadsUpDisplayLayerImpl::DrawFPSDisplay(
 364     SkCanvas* canvas,
 365     const FrameRateCounter* fps_counter,
 366     int right,
 367     int top) const {
 368   const int kPadding = 4;
 369   const int kGap = 6;
 370
 371   const int kFontHeight = 15;
 372
 373   const int kGraphWidth = fps_counter->time_stamp_history_size() - 2;
 374   const int kGraphHeight = 40;
 375
 376   const int kHistogramWidth = 37;
 377
 378   int width = kGraphWidth + kHistogramWidth + 4 * kPadding;
 379   int height = kFontHeight + kGraphHeight + 4 * kPadding + 2;
 380   int left = bounds().width() - width - right;
 381   SkRect area = SkRect::MakeXYWH(left, top, width, height);
 382
 383   SkPaint paint = CreatePaint();
 384   DrawGraphBackground(canvas, &paint, area);
 385
 386   SkRect text_bounds =
 387       SkRect::MakeXYWH(left + kPadding,
 388                        top + kPadding,
 389                        kGraphWidth + kHistogramWidth + kGap + 2,
 390                        kFontHeight);
 391   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 392                                          text_bounds.bottom() + 2 * kPadding,
 393                                          kGraphWidth,
 394                                          kGraphHeight);
 395   SkRect histogram_bounds = SkRect::MakeXYWH(graph_bounds.right() + kGap,
 396                                              graph_bounds.top(),
 397                                              kHistogramWidth,
 398                                              kGraphHeight);
 399
 400   const std::string value_text =
 401       base::StringPrintf("FPS:%5.1f", fps_graph_.value);
 402   const std::string min_max_text =
 403       base::StringPrintf("%.0f-%.0f", fps_graph_.min, fps_graph_.max);
 404
 405   VLOG(1) << value_text;
 406
 407   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 408   DrawText(canvas,
 409            &paint,
 410            value_text,
 411            SkPaint::kLeft_Align,
 412            kFontHeight,
 413            text_bounds.left(),
 414            text_bounds.bottom());
 415   DrawText(canvas,
 416            &paint,
 417            min_max_text,
 418            SkPaint::kRight_Align,
 419            kFontHeight,
 420            text_bounds.right(),
 421            text_bounds.bottom());
 422
 423   DrawGraphLines(canvas, &paint, graph_bounds, fps_graph_);
 424
 425   // Collect graph and histogram data.
 426   SkPath path;
 427
 428   const int kHistogramSize = 20;
 429   double histogram[kHistogramSize] = { 1.0 };
 430   double max_bucket_value = 1.0;
 431
 432   for (FrameRateCounter::RingBufferType::Iterator it = --fps_counter->end(); it;
 433        --it) {
 434     base::TimeDelta delta = fps_counter->RecentFrameInterval(it.index() + 1);
 435
 436     // Skip this particular instantaneous frame rate if it is not likely to have
 437     // been valid.
 438     if (!fps_counter->IsBadFrameInterval(delta)) {
 439       double fps = 1.0 / delta.InSecondsF();
 440
 441       // Clamp the FPS to the range we want to plot visually.
 442       double p = fps / fps_graph_.current_upper_bound;
 443       if (p > 1.0)
 444         p = 1.0;
 445
 446       // Plot this data point.
 447       SkPoint cur =
 448           SkPoint::Make(graph_bounds.left() + it.index(),
 449                         graph_bounds.bottom() - p * graph_bounds.height());
 450       if (path.isEmpty())
 451         path.moveTo(cur);
 452       else
 453         path.lineTo(cur);
 454
 455       // Use the fps value to find the right bucket in the histogram.
 456       int bucket_index = floor(p * (kHistogramSize - 1));
 457
 458       // Add the delta time to take the time spent at that fps rate into
 459       // account.
 460       histogram[bucket_index] += delta.InSecondsF();
 461       max_bucket_value = std::max(histogram[bucket_index], max_bucket_value);
 462     }
 463   }
 464
 465   // Draw FPS histogram.
 466   paint.setColor(DebugColors::HUDSeparatorLineColor());
 467   canvas->drawLine(histogram_bounds.left() - 1,
 468                    histogram_bounds.top() - 1,
 469                    histogram_bounds.left() - 1,
 470                    histogram_bounds.bottom() + 1,
 471                    paint);
 472   canvas->drawLine(histogram_bounds.right() + 1,
 473                    histogram_bounds.top() - 1,
 474                    histogram_bounds.right() + 1,
 475                    histogram_bounds.bottom() + 1,
 476                    paint);
 477
 478   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 479   const double bar_height = histogram_bounds.height() / kHistogramSize;
 480
 481   for (int i = kHistogramSize - 1; i >= 0; --i) {
 482     if (histogram[i] > 0) {
 483       double bar_width =
 484           histogram[i] / max_bucket_value * histogram_bounds.width();
 485       canvas->drawRect(
 486           SkRect::MakeXYWH(histogram_bounds.left(),
 487                            histogram_bounds.bottom() - (i + 1) * bar_height,
 488                            bar_width,
 489                            1),
 490           paint);
 491     }
 492   }
 493
 494   // Draw FPS graph.
 495   paint.setAntiAlias(true);
 496   paint.setStyle(SkPaint::kStroke_Style);
 497   paint.setStrokeWidth(1);
 498   canvas->drawPath(path, paint);
 499
 500   return area;
 501 }
 502
 503 SkRect HeadsUpDisplayLayerImpl::DrawMemoryDisplay(SkCanvas* canvas,
 504                                                   int right,
 505                                                   int top,
 506                                                   int width) const {
 507   if (!memory_entry_.total_bytes_used)
 508     return SkRect::MakeEmpty();
 509
 510   const int kPadding = 4;
 511   const int kFontHeight = 13;
 512
 513   const int height = 3 * kFontHeight + 4 * kPadding;
 514   const int left = bounds().width() - width - right;
 515   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 516
 517   const double kMegabyte = 1024.0 * 1024.0;
 518
 519   SkPaint paint = CreatePaint();
 520   DrawGraphBackground(canvas, &paint, area);
 521
 522   SkPoint title_pos = SkPoint::Make(left + kPadding, top + kFontHeight);
 523   SkPoint stat1_pos = SkPoint::Make(left + width - kPadding - 1,
 524                                     top + kPadding + 2 * kFontHeight);
 525   SkPoint stat2_pos = SkPoint::Make(left + width - kPadding - 1,
 526                                     top + 2 * kPadding + 3 * kFontHeight);
 527
 528   paint.setColor(DebugColors::MemoryDisplayTextColor());
 529   DrawText(canvas,
 530            &paint,
 531            "GPU memory",
 532            SkPaint::kLeft_Align,
 533            kFontHeight,
 534            title_pos);
 535
 536   std::string text = base::StringPrintf(
 537       "%6.1f MB used", memory_entry_.total_bytes_used / kMegabyte);
 538   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat1_pos);
 539
 540   if (!memory_entry_.had_enough_memory)
 541     paint.setColor(SK_ColorRED);
 542   text = base::StringPrintf("%6.1f MB max ",
 543                             memory_entry_.total_budget_in_bytes / kMegabyte);
 544   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat2_pos);
 545
 546   return area;
 547 }
 548
 549 SkRect HeadsUpDisplayLayerImpl::DrawGpuRasterizationStatus(SkCanvas* canvas,
 550                                                            int right,
 551                                                            int top,
 552                                                            int width) const {
 553   std::string status;
 554   SkColor color = SK_ColorRED;
 555   switch (layer_tree_impl()->GetGpuRasterizationStatus()) {
 556     case GpuRasterizationStatus::ON:
 557       status = "GPU raster: on";
 558       color = SK_ColorGREEN;
 559       break;
 560     case GpuRasterizationStatus::ON_FORCED:
 561       status = "GPU raster: on (forced)";
 562       color = SK_ColorGREEN;
 563       break;
 564     case GpuRasterizationStatus::OFF_DEVICE:
 565       status = "GPU raster: off (device)";
 566       color = SK_ColorRED;
 567       break;
 568     case GpuRasterizationStatus::OFF_VIEWPORT:
 569       status = "GPU raster: off (viewport)";
 570       color = SK_ColorYELLOW;
 571       break;
 572     case GpuRasterizationStatus::OFF_CONTENT:
 573       status = "GPU raster: off (content)";
 574       color = SK_ColorYELLOW;
 575       break;
 576   }
 577
 578   if (status.empty())
 579     return SkRect::MakeEmpty();
 580
 581   const int kPadding = 4;
 582   const int kFontHeight = 13;
 583
 584   const int height = kFontHeight + 2 * kPadding;
 585   const int left = bounds().width() - width - right;
 586   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 587
 588   SkPaint paint = CreatePaint();
 589   DrawGraphBackground(canvas, &paint, area);
 590
 591   SkPoint gpu_status_pos = SkPoint::Make(left + kPadding, top + kFontHeight);
 592
 593   paint.setColor(color);
 594   DrawText(canvas, &paint, status, SkPaint::kLeft_Align, kFontHeight,
 595            gpu_status_pos);
 596
 597   return area;
 598 }
 599
 600 SkRect HeadsUpDisplayLayerImpl::DrawPaintTimeDisplay(
 601     SkCanvas* canvas,
 602     const PaintTimeCounter* paint_time_counter,
 603     int right,
 604     int top) const {
 605   const int kPadding = 4;
 606   const int kFontHeight = 15;
 607
 608   const int kGraphWidth = paint_time_counter->HistorySize();
 609   const int kGraphHeight = 40;
 610
 611   const int width = kGraphWidth + 2 * kPadding;
 612   const int height =
 613       kFontHeight + kGraphHeight + 4 * kPadding + 2 + kFontHeight + kPadding;
 614   const int left = bounds().width() - width - right;
 615
 616   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 617
 618   SkPaint paint = CreatePaint();
 619   DrawGraphBackground(canvas, &paint, area);
 620
 621   SkRect text_bounds = SkRect::MakeXYWH(
 622       left + kPadding, top + kPadding, kGraphWidth, kFontHeight);
 623   SkRect text_bounds2 = SkRect::MakeXYWH(left + kPadding,
 624                                          text_bounds.bottom() + kPadding,
 625                                          kGraphWidth,
 626                                          kFontHeight);
 627   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 628                                          text_bounds2.bottom() + 2 * kPadding,
 629                                          kGraphWidth,
 630                                          kGraphHeight);
 631
 632   const std::string value_text =
 633       base::StringPrintf("%.1f", paint_time_graph_.value);
 634   const std::string min_max_text = base::StringPrintf(
 635       "%.1f-%.1f", paint_time_graph_.min, paint_time_graph_.max);
 636
 637   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 638   DrawText(canvas, &paint, "Compositor frame time (ms)", SkPaint::kLeft_Align,
 639            kFontHeight, text_bounds.left(), text_bounds.bottom());
 640   DrawText(canvas,
 641            &paint,
 642            value_text,
 643            SkPaint::kLeft_Align,
 644            kFontHeight,
 645            text_bounds2.left(),
 646            text_bounds2.bottom());
 647   DrawText(canvas,
 648            &paint,
 649            min_max_text,
 650            SkPaint::kRight_Align,
 651            kFontHeight,
 652            text_bounds2.right(),
 653            text_bounds2.bottom());
 654
 655   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 656   for (PaintTimeCounter::RingBufferType::Iterator it =
 657            paint_time_counter->End();
 658        it;
 659        --it) {
 660     double pt = it->InMillisecondsF();
 661
 662     if (pt == 0.0)
 663       continue;
 664
 665     double p = pt / paint_time_graph_.current_upper_bound;
 666     if (p > 1.0)
 667       p = 1.0;
 668
 669     canvas->drawRect(
 670         SkRect::MakeXYWH(graph_bounds.left() + it.index(),
 671                          graph_bounds.bottom() - p * graph_bounds.height(),
 672                          1,
 673                          p * graph_bounds.height()),
 674         paint);
 675   }
 676
 677   DrawGraphLines(canvas, &paint, graph_bounds, paint_time_graph_);
 678
 679   return area;
 680 }
 681
 682 void HeadsUpDisplayLayerImpl::DrawDebugRect(
 683     SkCanvas* canvas,
 684     SkPaint* paint,
 685     const DebugRect& rect,
 686     SkColor stroke_color,
 687     SkColor fill_color,
 688     float stroke_width,
 689     const std::string& label_text) const {
 690   gfx::Rect debug_layer_rect =
 691       gfx::ScaleToEnclosingRect(rect.rect, 1.0 / internal_contents_scale_,
 692                                 1.0 / internal_contents_scale_);
 693   SkIRect sk_rect = RectToSkIRect(debug_layer_rect);
 694   paint->setColor(fill_color);
 695   paint->setStyle(SkPaint::kFill_Style);
 696   canvas->drawIRect(sk_rect, *paint);
 697
 698   paint->setColor(stroke_color);
 699   paint->setStyle(SkPaint::kStroke_Style);
 700   paint->setStrokeWidth(SkFloatToScalar(stroke_width));
 701   canvas->drawIRect(sk_rect, *paint);
 702
 703   if (label_text.length()) {
 704     const int kFontHeight = 12;
 705     const int kPadding = 3;
 706
 707     // The debug_layer_rect may be huge, and converting to a floating point may
 708     // be lossy, so intersect with the HUD layer bounds first to prevent that.
 709     gfx::Rect clip_rect = debug_layer_rect;
 710     clip_rect.Intersect(gfx::Rect(internal_content_bounds_));
 711     SkRect sk_clip_rect = RectToSkRect(clip_rect);
 712
 713     canvas->save();
 714     canvas->clipRect(sk_clip_rect);
 715     canvas->translate(sk_clip_rect.x(), sk_clip_rect.y());
 716
 717     SkPaint label_paint = CreatePaint();
 718     label_paint.setTextSize(kFontHeight);
 719     label_paint.setTypeface(typeface_.get());
 720     label_paint.setColor(stroke_color);
 721
 722     const SkScalar label_text_width =
 723         label_paint.measureText(label_text.c_str(), label_text.length());
 724     canvas->drawRect(SkRect::MakeWH(label_text_width + 2 * kPadding,
 725                                     kFontHeight + 2 * kPadding),
 726                      label_paint);
 727
 728     label_paint.setAntiAlias(true);
 729     label_paint.setColor(SkColorSetARGB(255, 50, 50, 50));
 730     canvas->drawText(label_text.c_str(),
 731                      label_text.length(),
 732                      kPadding,
 733                      kFontHeight * 0.8f + kPadding,
 734                      label_paint);
 735
 736     canvas->restore();
 737   }
 738 }
 739
 740 void HeadsUpDisplayLayerImpl::DrawDebugRects(
 741     SkCanvas* canvas,
 742     DebugRectHistory* debug_rect_history) {
 743   SkPaint paint = CreatePaint();
 744
 745   const std::vector<DebugRect>& debug_rects = debug_rect_history->debug_rects();
 746   std::vector<DebugRect> new_paint_rects;
 747
 748   for (size_t i = 0; i < debug_rects.size(); ++i) {
 749     SkColor stroke_color = 0;
 750     SkColor fill_color = 0;
 751     float stroke_width = 0.f;
 752     std::string label_text;
 753
 754     switch (debug_rects[i].type) {
 755       case PAINT_RECT_TYPE:
 756         new_paint_rects.push_back(debug_rects[i]);
 757         continue;
 758       case PROPERTY_CHANGED_RECT_TYPE:
 759         stroke_color = DebugColors::PropertyChangedRectBorderColor();
 760         fill_color = DebugColors::PropertyChangedRectFillColor();
 761         stroke_width = DebugColors::PropertyChangedRectBorderWidth();
 762         break;
 763       case SURFACE_DAMAGE_RECT_TYPE:
 764         stroke_color = DebugColors::SurfaceDamageRectBorderColor();
 765         fill_color = DebugColors::SurfaceDamageRectFillColor();
 766         stroke_width = DebugColors::SurfaceDamageRectBorderWidth();
 767         break;
 768       case REPLICA_SCREEN_SPACE_RECT_TYPE:
 769         stroke_color = DebugColors::ScreenSpaceSurfaceReplicaRectBorderColor();
 770         fill_color = DebugColors::ScreenSpaceSurfaceReplicaRectFillColor();
 771         stroke_width = DebugColors::ScreenSpaceSurfaceReplicaRectBorderWidth();
 772         break;
 773       case SCREEN_SPACE_RECT_TYPE:
 774         stroke_color = DebugColors::ScreenSpaceLayerRectBorderColor();
 775         fill_color = DebugColors::ScreenSpaceLayerRectFillColor();
 776         stroke_width = DebugColors::ScreenSpaceLayerRectBorderWidth();
 777         break;
 778       case TOUCH_EVENT_HANDLER_RECT_TYPE:
 779         stroke_color = DebugColors::TouchEventHandlerRectBorderColor();
 780         fill_color = DebugColors::TouchEventHandlerRectFillColor();
 781         stroke_width = DebugColors::TouchEventHandlerRectBorderWidth();
 782         label_text = "touch event listener";
 783         break;
 784       case WHEEL_EVENT_HANDLER_RECT_TYPE:
 785         stroke_color = DebugColors::WheelEventHandlerRectBorderColor();
 786         fill_color = DebugColors::WheelEventHandlerRectFillColor();
 787         stroke_width = DebugColors::WheelEventHandlerRectBorderWidth();
 788         label_text = "mousewheel event listener";
 789         break;
 790       case SCROLL_EVENT_HANDLER_RECT_TYPE:
 791         stroke_color = DebugColors::ScrollEventHandlerRectBorderColor();
 792         fill_color = DebugColors::ScrollEventHandlerRectFillColor();
 793         stroke_width = DebugColors::ScrollEventHandlerRectBorderWidth();
 794         label_text = "scroll event listener";
 795         break;
 796       case NON_FAST_SCROLLABLE_RECT_TYPE:
 797         stroke_color = DebugColors::NonFastScrollableRectBorderColor();
 798         fill_color = DebugColors::NonFastScrollableRectFillColor();
 799         stroke_width = DebugColors::NonFastScrollableRectBorderWidth();
 800         label_text = "repaints on scroll";
 801         break;
 802       case ANIMATION_BOUNDS_RECT_TYPE:
 803         stroke_color = DebugColors::LayerAnimationBoundsBorderColor();
 804         fill_color = DebugColors::LayerAnimationBoundsFillColor();
 805         stroke_width = DebugColors::LayerAnimationBoundsBorderWidth();
 806         label_text = "animation bounds";
 807         break;
 808     }
 809
 810     DrawDebugRect(canvas,
 811                   &paint,
 812                   debug_rects[i],
 813                   stroke_color,
 814                   fill_color,
 815                   stroke_width,
 816                   label_text);
 817   }
 818
 819   if (new_paint_rects.size()) {
 820     paint_rects_.swap(new_paint_rects);
 821     fade_step_ = DebugColors::kFadeSteps;
 822   }
 823   if (fade_step_ > 0) {
 824     fade_step_--;
 825     for (size_t i = 0; i < paint_rects_.size(); ++i) {
 826       DrawDebugRect(canvas,
 827                     &paint,
 828                     paint_rects_[i],
 829                     DebugColors::PaintRectBorderColor(fade_step_),
 830                     DebugColors::PaintRectFillColor(fade_step_),
 831                     DebugColors::PaintRectBorderWidth(),
 832                     "");
 833     }
 834   }
 835 }
 836
 837 const char* HeadsUpDisplayLayerImpl::LayerTypeAsString() const {
 838   return "cc::HeadsUpDisplayLayerImpl";
 839 }
 840
 841 void HeadsUpDisplayLayerImpl::AsValueInto(
 842     base::trace_event::TracedValue* dict) const {
 843   LayerImpl::AsValueInto(dict);
 844   dict->SetString("layer_name", "Heads Up Display Layer");
 845 }
 846
 847 }  // namespace cc